Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
doc hieu » toc thieu, hoc thieu
cong san » cong tac
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) cach - hanh trinh vat nhung cong san ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) cach - hanh trinh vat nhung cong san ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) cach - hanh trinh vat nhung cong san ((than cau) or (phan cau))*.